We have very advanced technology. Features: Maximum Power: 400W Maximum Power Current(IMP): 2.77A Maximum Power Voltage(VMP): 18.0V Short Circuit Current(ISC): 3.23A Temperature Range:-40°F-180°F Power Tolerance: 0-3% Solar Cell: Monocrystalline Grade A+ Open Circuit Voltage(VOC) :22V SIZE:6757cm Package Contents: 1solar panel.